- a furrow or groove.
- Anatomy. a groove or fissure, especially a fissure between two convolutions of the brain.
Origin of sulcus
1655–65; Latin: furrow
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for sulcus
There is only one ciliated groove, the sulcus, in the stomodaeum.
These grooves are known as the sulcus and sulculus, and will be more particularly described hereafter.
Each zooid has six tentacles; the stomodaeum is elongate, but the sulcus and sulculus are very feebly represented.
The sulcus is bifurcate; the fork is near the base and almost gives the appearance of two sulci on some specimens.
It is then carried across the sulcus and is made to emerge through the opposite lip of the cervix.
- a linear groove, furrow, or slight depression
- any of the narrow grooves on the surface of the brain that mark the cerebral convolutionsCompare fissure
C17: from Latin
Word Origin and History for sulcus
plural sulci, Latin, literally "furrow, trench, ditch, wrinkle."
Online Etymology Dictionary, © 2010 Douglas Harper
- Any of the grooves on the brain surface, bounding the gyri; a fissure.
- A long narrow groove or depression, as in an organ or a tissue.